EduNinjaThe table shows the number of amino acids that are different in the sequences of the protein FOXP2 from a human compared with four other primate species.
Some infectious diseases in humans are caused by viruses that originated in other primates.
State one structural feature of a virus.
The micrograph is an image of human cheek cells viewed with a light microscope.
Viruses depend on living cells to reproduce. Compare and contrast the lysogenic and lytic cycles of the bacteriophage lambda.
The image shows an electron micrograph of virus particles known to infect the bacterium Vibrio parahaemolyticus, which is associated with gastroenteritis, wound infections and septicemia in humans and animals.
What does a virus have in common with a living cell?
70 S ribosomes
Genetic material
Reproduction by binary fission
Anaerobic respiration
Pathogens are disease-causing organisms.
Outline two reasons for the very rapid rates of evolution in some viruses.
What mode of existence do viruses exhibit?
Obligate parasite
Facultative parasite
Obligate heterotroph
Predator
What is a difference between the lytic and the lysogenic cycle of the bacteriophage lambda?
Only in the lytic cycle is lambda DNA inserted into the host DNA.
Only in the lysogenic cycle is the host metabolism used to replicate.
Only in the lytic cycle is the host metabolism used to replicate.
Only in the lysogenic cycle is lambda DNA inserted into the host DNA.
Which feature is common to all viruses?
Has a capsid
Contains RNA
Contains cytoplasm
Enveloped in host cell membrane
The diagrams show a virus and a bacterium.
State the method that bacteria use to divide.
State one reason that viruses are not classified as living organisms.
Honey bees (Apis mellifera) can suffer from lethal diseases caused by different viruses. An epidemiological study was undertaken to identify the presence of five viruses in 90 diseased honey bee colonies in the nine states of Austria.
Identify the state with the greatest percentage of colonies infected with virus S .
Compare the percentage of colonies infected with the different viruses in state 1 and state 4.